Cupola-furnace.



Patented Dec. 12,1916

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W. WAGNER.

CUPOLA FURNACE.

APPLICATION FILED FEBJI, m3.

Patented Dec. 12, 1916.

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@TATEd PATENT UFFTfihl.

WLADYSLAW WAGNER, 0F LODZ, POLAND.

CUPOLA-IEURNAGE.

Specification of Letters Patent.

Application filed February 17, 1913. Serial No. 749,016.

To all whom it may concern Be it known that I, WLADYSLAW WAGNER, a subject of the Czar of Russia, and residing at Lodz, Russian Poland, have invented certain new and useful Improvements in Cupola-Furnaces, of which the following is a specification.

My invention relates to cupola furnaces, and a primary object is to provide a furnace which will serve not only for smelting the usual charge-iron, but also in an exceedingly economical manner for smelting simultaneously iron shavings. To this end I provide in the smelting zone of the cupola furnace an adjoining conduit, into which the iron shavings are supplied from above and therefore directly into the smelting zone, these shavings being preferably pressed into briquets by suitable devices, and which is so connected below to a receiver that the shavings supplied become melted by the surplus heat obtained when melting the usual charge-iron, and hence without use of additional combustion material and with the smallest possible waste. Moreover these shavings when in the liquid condition reach the receiver without being exposed to the gases generated in the cupola furnace proper, e. g. sulfur, which is there liberated during the smelting process. Moreover arrangements are made in the cupola furnace for automatically mixing the shaving-iron and charge-iron together when such is desired.

One illustrative embodiment of my invention is represented by way of example in the accompanying drawing, wherein Figure 1 is a sectional elevation of the new cupola furnace, Fig. 2 a section on the line AA in Fig. 1, Fig. 3 a section through a portion of the press for the shavings, Fig. 4 an elevation of the portion referred to in Fig. 3, Fig. 5 a section through one of the conical nozzles in the briquet-making device, and Fig. 6 an end view of said nozzle.

Referring to the drawing, the cupalo furnace a, which is otherwise constructed in the usual manner, has a fore-hearth or container 6 for the molten charge-iron. According to my invention a conduit 0 is built in the melt ing zone of the cupola furnace, and is connected below with a receiver cl. In the upper part of the conduit 0, a device is arranged for supplying to the conduit the shavings to be melted, such shavings being preferably supplied in a compressed 'condi tion. The compression device, which can be variously arranged, preferably consists of two cylinders e, f which are suitably bolted together and rest on a bracket 9. Connected to the cylinders are tubes 72., through which the shavings pass from the charging platform into the cylinders. A piston 2' moves ineach cylinder, being reciprocated by a suitable crank-drive is. Extending from each cylinder is a tapered nozzle Z which isoffset from the wall of said conduit 0 and is directed toward the latter. When therefore the shavings pass through the tubes 71. into the cylinders c, f, they are thrust forward by the reciprocating pistons z, and, owing to the resistance produced by the narrowing taper of the nozzle Z, become compressed, to be thereafter thrust forward into the conduit 0. Here the shavings are immediately converted to molten iron by the surplus heat, and an extremely small waste thus occurs. The molten shavings fall through the conduit 0 in the receiver d, and can be here reduced in clean condition. Now to automatically obtain a predetermined mixture of shaving-iron with the usual charge-iron, or to prevent such mixture, the bottom m of the cupola furnace proper is constructed in a suitable manner. For instance when it is desired to prevent a mix ture of the shaving-iron with the chargeiron, the bottom has a surface inclined to ward the usual container 6, so that, owing to this inclined plane, all the charge-iron is conducted away toward the hearth b and does not reach the hearth cl. If however a predetermined mixture of charge-iron and shaving-iron is desired, the bottom, as seen in Fig. 1, is formed of two inclined surfaces meeting at an obtuse angle, the length of such surfaces being in each case variously determined according to the percentage of the mixture to be obtained. This is indicated by the various steps 0 to 5. As is readily understood, owing to this arrangement of surfaces, a portion of the chargeiron flows into the container 03, the amount of such iron being directly proportional to the length of the surface adjacent to and leading toward the container d. A predetermined mixture of charge-iron and shavingiron is thus automatically obtainable, while only the pure charge-iron is found in the container cl. When a very large quantity of shaving-iron collects in the container and is not tapped therefrom, a portion of this ing-iron can be here obtained.

iron will overflow into the container 12, whereby a mlxture of charge-iron and shav- Vnomical :manner, Without the use of additional combustion material and without waste, only the surplus heat obtained when smelting the .ordinary charge-iron being new needed for this purpose.

An advantage simultaneously ,obtained with my new cupola furnace is that the shavings, by being led direct into the smelting vzone, are not exposed to ;the gases liberated thecupola gfur-nace proper during the melting p ss, whe e y se gases a hav .1110 d im n a zefieq o the h gron- 7 fl :claim: 7 v

1 1n asnieltin-g furnace, the combination of ,a conduit associated with said furnace and located Within the smelting zone of ,the latter, a receiver communicating with the conduit from which the iron may be drawn off, and ,means for pressing iron shavings into b riquets connected .with the conduit ,at a point adjacent the smelting zone thereof for introducing the iron shavingsaforesaid n ot rqonduit. r

2. A .cupola furnace having a conduit located ,within the smelting zone of the furnace and provided with afore-hea'rthor container for charge iron the bottom of the fur- 'nace being inclined toward said container for the purpose set forth. p

3. A cupola furnace having aeconduit lo.- cated within the smelting zone of the fur.-

nace and provided with a fore-hearth or contamer for charge iron, the bottom of said furnace being formed with oppositely incontainer for the charge iron, a receiver communicating with said conduit, means for compressing and introducing iron shavings into the conduit so that they will be deposited in said receiver, vthe other surface of the bottomof the furnace inclining toward said receiver.

4 A cupola furnace comprising a bottom having oppositely inclined surfaces, and having ,a: conduit located within the smelting zone of the furnace, a container disposed at oneside of the furnace and adapted to receive charge iron, one of the inclined bottom surfaces of the furnace inclining towardsaid container, a receiver communicating ,with theconduit aforesaid and disposed at theside of the ,furnaceoppositc the said container, the other surface of the bottom of ,the furnace inclining toward said receiver, ,the arrangement of the bottom surfaces aforesaid being such ;that charge iron introduced into the furnace is directed to the container above referred to, and iron shavings introduced into the conduit are directed to the receiver.

In testimony, that I claim .the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

VVLADYSLAVV KVAGNER.

Witnesses K. 'IINJCRAUSNERLI, F. EDR MBICK.

qgpies of this nstent maybenbtainedfoflfive cents each, by addressing the Commissioner of Patents, Ywasni ngton, 11-0. 

